Sheriff David Clarke: Obama Is the Only President to Tell Drug Dealers, Rapists, Killers 'They Are the Product of a Racist Criminal Justice System' -- Milwaukee County Sheriff David Clarke told an audience at the National Rifle Association-Institute for Legislative Action's (NRA-ILA) Leadership Forum in Louisville, Ky., on Friday that President Barack Obama is the first president in history to visit a prison and tell rapists, drug dealers, and murderers "that they are the product of a racist criminal justice system."